Rectification and filtering

A simple rectifier filter board, using 4700uF*4 positive and negative power supplies, which can be replaced with larger capacity capacitors of the same volume. There are two input terminals, which one you want, you can delete the one you don’t use. Comes with a switch for easy testing and use. There are two LEDs at the output, which can discharge the capacitor. When the input is plus or minus 15, it takes about 3 minutes to discharge. The output also has two terminals with 4P pin header, -GG+. There is a window on the back of the input part, so it can be tinned if the current is large. There are also four 104 capacitors at both ends to filter high frequencies. The Nobel portrait was made during this year's Nobel Prize presentation period. The fixing hole is 3mm. LED is 1206. Excess parts can be deleted to reduce the area.

front

back

working lamp

The voltage is 20V (the multimeter’s reading is too low)